function thead = new(obj,segyrev,numhdrs)
%
% function thead = new(obj,segyrev,numhdrs)
%
% new creates a new SEG-Y rev1 textual header in ASCII format
%
% Authors: Kevin Hall, 2017
%
% NOTE: This SOFTWARE may be used by any individual or corporation for any purpose
% with the exception of re-selling or re-distributing the SOFTWARE.
% By using this software, you are agreeing to the terms detailed in this software's
% Matlab source file.

% BEGIN TERMS OF USE LICENSE
%
% This SOFTWARE is maintained by the CREWES Project at the Department
% of Geology and Geophysics of the University of Calgary, Calgary,
% Alberta, Canada.  The copyright and ownership is jointly held by
% its 'AUTHOR' (identified above) and the CREWES Project.  The CREWES
% project may be contacted via email at:  crewesinfo@crewes.org
%
% The term 'SOFTWARE' refers to the Matlab source code, translations to
% any other computer language, or object code
%
% Terms of use of this SOFTWARE
%
% 1) This SOFTWARE may be used by any individual or corporation for any purpose
%    with the exception of re-selling or re-distributing the SOFTWARE.
%
% 2) The AUTHOR and CREWES must be acknowledged in any resulting publications or
%    presentations
%
% 3) This SOFTWARE is provided "as is" with no warranty of any kind
%    either expressed or implied. CREWES makes no warranties or representation
%    as to its accuracy, completeness, or fitness for any purpose. CREWES
%    is under no obligation to provide support of any kind for this SOFTWARE.
%
% 4) CREWES periodically adds, changes, improves or updates this SOFTWARE without
%    notice. New versions will be made available at www.crewes.org .
%
% 5) Use this SOFTWARE at your own risk.
%
% END TERMS OF USE LICENSE

narginchk(1,3);

if nargin<2 || isempty(segyrev)
   segyrev=obj.SegyRevision;      
end
if nargin<3
   numhdrs=obj.NumExtTxtHdrs;
end

thead = [];

if segyrev <1 || numhdrs <1
    return
else
    asciispace = uint8(' ');
    
    hdr = char(ones(40,80,'uint8').*asciispace);
    
    for ii = 1:numhdrs
        thead = [thead; hdr];
    end
    
    thead(end,1:16) = '((SEG: EndText))';
end